Insectacides/cleaner. There are several insectacides, like weed killer from a family of chemical products called organophosphates that can be directly poisonous, and can also cause cancer. Heavy duty cleaners, like cleansers can also cause cancer. Even talcum powder, make-up, hair conditioner, and foods can do it.

Www.ewg.org. See the above website for lots of great information on toxins, their effects on us and how to avoid them from the environmental working group. Specific to your question, see this page: http://www.Ewg.Org/bodyburden/consumerproducts.